Mplus VERSION 7.3
MUTHEN & MUTHEN
09/22/2014   5:48 PM

INPUT INSTRUCTIONS

  TITLE:	this is an example of a two-group twin
  	model for continuous outcomes where
  	factors represent the ACE components
  DATA:	FILE = ex5.18.dat;
  VARIABLE:	NAMES = y1 y2 g;
  	GROUPING = g (1 = mz 2 = dz);
  ANALYSIS:MODEL = NOCOVARIANCES;
  MODEL:	[y1-y2]   (1);
  	y1-y2@0;
  	a1 BY y1* (2);
  	a2 BY y2* (2);
  	c1 BY y1* (3);
  	c2 BY y2* (3);
  	e1 BY y1* (4);
  	e2 BY y2* (4);
  	a1-e2@1;
  	[a1-e2@0];
  	a1 WITH a2@1;
  	c1 WITH c2@1;
  MODEL dz:	a1 WITH a2@.5;



INPUT READING TERMINATED NORMALLY



this is an example of a two-group twin
model for continuous outcomes where
factors represent the ACE components

SUMMARY OF ANALYSIS

Number of groups                                                 2
Number of observations
   Group MZ                                                   1000
   Group DZ                                                   1000
   Total sample size                                          2000

Number of dependent variables                                    2
Number of independent variables                                  0
Number of continuous latent variables                            6

Observed dependent variables

  Continuous
   Y1          Y2

Continuous latent variables
   A1          A2          C1          C2          E1          E2

Variables with special functions

  Grouping variable     G

Estimator                                                       ML
Information matrix                                        OBSERVED
Maximum number of iterations                                  1000
Convergence criterion                                    0.500D-04
Maximum number of steepest descent iterations                   20

Input data file(s)
  ex5.18.dat

Input data format  FREE



THE MODEL ESTIMATION TERMINATED NORMALLY

     WARNING:  THE LATENT VARIABLE COVARIANCE MATRIX (PSI) IN GROUP MZ
     IS NOT POSITIVE DEFINITE.  THIS COULD INDICATE A NEGATIVE VARIANCE/
     RESIDUAL VARIANCE FOR A LATENT VARIABLE, A CORRELATION GREATER OR EQUAL
     TO ONE BETWEEN TWO LATENT VARIABLES, OR A LINEAR DEPENDENCY AMONG MORE
     THAN TWO LATENT VARIABLES.  CHECK THE TECH4 OUTPUT FOR MORE INFORMATION.
     PROBLEM INVOLVING VARIABLE A2.


     WARNING:  THE LATENT VARIABLE COVARIANCE MATRIX (PSI) IN GROUP DZ
     IS NOT POSITIVE DEFINITE.  THIS COULD INDICATE A NEGATIVE VARIANCE/
     RESIDUAL VARIANCE FOR A LATENT VARIABLE, A CORRELATION GREATER OR EQUAL
     TO ONE BETWEEN TWO LATENT VARIABLES, OR A LINEAR DEPENDENCY AMONG MORE
     THAN TWO LATENT VARIABLES.  CHECK THE TECH4 OUTPUT FOR MORE INFORMATION.
     PROBLEM INVOLVING VARIABLE C2.




MODEL FIT INFORMATION

Number of Free Parameters                        4

Loglikelihood

          H0 Value                       -5217.340
          H1 Value                       -5214.760

Information Criteria

          Akaike (AIC)                   10442.679
          Bayesian (BIC)                 10465.083
          Sample-Size Adjusted BIC       10452.375
            (n* = (n + 2) / 24)

Chi-Square Test of Model Fit

          Value                              5.160
          Degrees of Freedom                     6
          P-Value                           0.5235

Chi-Square Contribution From Each Group

          MZ                                 3.443
          DZ                                 1.718

RMSEA (Root Mean Square Error Of Approximation)

          Estimate                           0.000
          90 Percent C.I.                    0.000  0.038
          Probability RMSEA <= .05           0.993

CFI/TLI

          CFI                                1.000
          TLI                                1.000

Chi-Square Test of Model Fit for the Baseline Model

          Value                            994.489
          Degrees of Freedom                     2
          P-Value                           0.0000

SRMR (Standardized Root Mean Square Residual)

          Value                              0.022



MODEL RESULTS

                                                    Two-Tailed
                    Estimate       S.E.  Est./S.E.    P-Value

Group MZ

 A1       BY
    Y1                 0.801      0.035     23.136      0.000

 A2       BY
    Y2                 0.801      0.035     23.136      0.000

 C1       BY
    Y1                 0.333      0.078      4.293      0.000

 C2       BY
    Y2                 0.333      0.078      4.293      0.000

 E1       BY
    Y1                 0.515      0.011     45.047      0.000

 E2       BY
    Y2                 0.515      0.011     45.047      0.000

 A1       WITH
    A2                 1.000      0.000    999.000    999.000

 C1       WITH
    C2                 1.000      0.000    999.000    999.000

 Means
    A1                 0.000      0.000    999.000    999.000
    A2                 0.000      0.000    999.000    999.000
    C1                 0.000      0.000    999.000    999.000
    C2                 0.000      0.000    999.000    999.000
    E1                 0.000      0.000    999.000    999.000
    E2                 0.000      0.000    999.000    999.000

 Intercepts
    Y1                 0.008      0.020      0.395      0.693
    Y2                 0.008      0.020      0.395      0.693

 Variances
    A1                 1.000      0.000    999.000    999.000
    A2                 1.000      0.000    999.000    999.000
    C1                 1.000      0.000    999.000    999.000
    C2                 1.000      0.000    999.000    999.000
    E1                 1.000      0.000    999.000    999.000
    E2                 1.000      0.000    999.000    999.000

 Residual Variances
    Y1                 0.000      0.000    999.000    999.000
    Y2                 0.000      0.000    999.000    999.000

Group DZ

 A1       BY
    Y1                 0.801      0.035     23.136      0.000

 A2       BY
    Y2                 0.801      0.035     23.136      0.000

 C1       BY
    Y1                 0.333      0.078      4.293      0.000

 C2       BY
    Y2                 0.333      0.078      4.293      0.000

 E1       BY
    Y1                 0.515      0.011     45.047      0.000

 E2       BY
    Y2                 0.515      0.011     45.047      0.000

 A1       WITH
    A2                 0.500      0.000    999.000    999.000

 C1       WITH
    C2                 1.000      0.000    999.000    999.000

 Means
    A1                 0.000      0.000    999.000    999.000
    A2                 0.000      0.000    999.000    999.000
    C1                 0.000      0.000    999.000    999.000
    C2                 0.000      0.000    999.000    999.000
    E1                 0.000      0.000    999.000    999.000
    E2                 0.000      0.000    999.000    999.000

 Intercepts
    Y1                 0.008      0.020      0.395      0.693
    Y2                 0.008      0.020      0.395      0.693

 Variances
    A1                 1.000      0.000    999.000    999.000
    A2                 1.000      0.000    999.000    999.000
    C1                 1.000      0.000    999.000    999.000
    C2                 1.000      0.000    999.000    999.000
    E1                 1.000      0.000    999.000    999.000
    E2                 1.000      0.000    999.000    999.000

 Residual Variances
    Y1                 0.000      0.000    999.000    999.000
    Y2                 0.000      0.000    999.000    999.000


QUALITY OF NUMERICAL RESULTS

     Condition Number for the Information Matrix              0.137E-01
       (ratio of smallest to largest eigenvalue)


     Beginning Time:  17:48:36
        Ending Time:  17:48:36
       Elapsed Time:  00:00:00



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